3D Game Man posted a review on the Razer Lachesis Mouse & Lycosa Keyboard

The Razer Lachesis mouse has a sleek design that's very comfortable to hold and comes with nine programmable hyperesponse buttons. There's the main left and right click Ultra-large non-slip buttons, two buttons on the left side, two buttons on the right side, two buttons at the top and a scroll wheel button. This mouse is kinda large and might not fit some hands. The Razer Laycosa keyboard is black, constructed from plastic and has a sleek design but is rather large since it is a full size keyboard. The included wrist rest adds to the size and does offer comfort when gaming for an extended period, but it can be removed if preferred. One of the first things you'll notice about this keyboard is that the keys are backlit. This is fantastic for dark rooms while gaming or watching movies. Note the backlight can be always on or turned off and there's a gaming WASD key cluster lighting option. Watch the video to find out more and check out the bloopers at the end.

Razer Lachesis Mouse & Lycosa Keyboard Review